Seasonal variation in ecophysiological patterns in macroalgae from an Arctic fjord. II. Pigment accumulation and biochemical defence systems against high light stress
- J. Aguilera, K. Bischof, U. Karsten, D. Hanelt, C. Wiencke
- Environmental Science
- 2002
Overall, the synthesis of UV-absorbing substances and the increase in the activity of the antioxidative systems in the open-water period imply an increased resistance to high underwater light conditions, including UV radiation.
Enzymatic defences against photooxidative stress induced by ultraviolet radiation in Arctic marine macroalgae
- J. Aguilera, A. Dummermuth, U. Karsten, R. Schriek, C. Wiencke
- Environmental SciencePolar Biology
- 1 June 2002
Overall, the ecological success of macroalgae in the eulittoral and upper sublittoral is supported by an enhanced oxygen-reactive scavenging system, allowing fast acclimation to the changes in environmental radiation conditions.
Effects of solar radiation on photoinhibition and pigmentation in the red alga Porphyra leucosticta
- F. Figueroa, S. Salles, M. Altamirano
- Environmental Science
- 22 May 1997
Results seem to indicate that the accuniulation of pigments is affected by solar radiation, with short-term changes induced by UV light, as well as the ecological relevance of the daily variations of photosynthesis and pigmentation under solar radiation.
The response of nutrient assimilation and biochemical composition of Arctic seaweeds to a nutrient input in summer.
- F. J. Gordillo, J. Aguilera, C. Jiménez
- Environmental ScienceJournal of Experimental Botany
- 1 August 2006
Despite enzymatic and pigmentary response, the Arctic seaweeds can be regarded as not being N-limited even in summer, as shown by the slight effect of nutrient enrichment on biochemical composition.
Effects of solar radiation on growth, photosynthesis and respiration of marine macroalgae from the Arctic
- J. Aguilera, U. Karsten, C. Wiencke
- Environmental Science
- 30 December 1999
In general, no inhibitory UV effect on respiratory oxygen consumption in all macroalgae studied was detected under the artificial radiation regimes described above, with the exception of the brown alga Desmarestia aculeata and the green alga Mono-stroma arcticum, both showing a significant stimulation of respiration after 2 h of UV exposure.
Long-term effects of ultraviolet radiation on growth and photosynthetic performance of polar and cold-temperate macroalgae
- T. Michler, J. Aguilera, D. Hanelt, K. Bischof, C. Wiencke
- Environmental Science
- 1 June 2002
The obtained results show that measuring growth is a good ecological parameter to monitor long-term effects of UV radiation on single macroalgal species and the possible resulting changes of whole algal communities in coastal ecosystems.
Effects of solar UV radiation on photosynthesis of the marine angiosperm Posidonia oceanica from southern Spain
- F. Figueroa, C. Jiménez, D. Häder
- Environmental Science
- 5 April 2002
The effects of solar irradiance on the photosynthesis of the marine angiosperm Posido- nia oceanica L. Delile were investigated by means of pulse amplitude-modulated (PAM) fluorescence in the Natural…
Seasonal variation in ecophysiological patterns in macroalgae from an Arctic fjord. II. Pigment accumulation and biochemical defence systems against high light stress
- J. Aguilera, K. Bischof, U. Karsten, D. Hanelt, C. Wiencke
- Environmental Science
- 2002
Effect of light quality on the accumulation of photosynthetic pigments, proteins and mycosporine-like amino acids in the red alga Porphyra leucosticta (Bangiales, Rhodophyta).
- N. Korbee, F. Figueroa, J. Aguilera
- Environmental ScienceJournal of Photochemistry and Photobiology. B…
- 1 August 2005
Availability of ammonium influences photosynthesis and the accumulation of mycosporine-like amino acids in two Porphyra species (Bangiales, Rhodophyta)
- N. Korbee, P. Huovinen, F. Figueroa, J. Aguilera, U. Karsten
- Environmental Science
- 1 March 2005
Ammonium supply diminished the decrease of Fv/Fm, increased the content of photosynthetic pigments and soluble protein, and stimulated of the accumulation of MAAs in the red algae P. leucosticta and P. umbilicalis.
...
...